table {
  width: 200px;
  height: 200px;
  border: 1px solid black;
  border-spacing: 0px;
  border-collapse: collapse;
}

tr,
td {
  border: 1px solid black;
  padding: 20px;
}

table tr td:last-child {
  background-color: rgb(81, 81, 248);
}